In a Fraction = NumeratorDenominator
So (i) 37
The numerator of the fraction = 3
The denominator of the fraction = 7
Difference = 7 - 3 = 4
(ii) 49
The numerator of the fraction = 4
The denominator of the fraction = 9
Difference = 9 - 4 = 5
(iii) 17
The numerator of the fraction = 1
The denominator of the fraction = 7
Difference = 7 - 1 = 6